In this article i’ll talked about using DS1340 real-time clock on the DM355 EVM board.

TI DM355 EVM board has a rtc circuit that is formed by MSP430 uC but, it is not suitable for custom design especially cost restrictive applications. Therefore rtc circuit with DS1340 inserted into I2C bus on the evm board Data Connector (DC3). Details about i2c bus on the evm board can be obtain from TMS320DM355 Evaluation Module Technical Reference on page A-25

Fig:1 DM355 EVM Board

DM355 EVM board can be seen In fig 1.

In this application i have used linux kernel 2.6.31-rc7 on the DM355 evm board. Unfortunately kernel 2.6.10 and kernel 2.6.18 are maintained by MontaVista have no DS1340 RTC driver for Davinci DM355 platform. Be careful about ST M41T00 (DS1340 compliant) RTC is available on kernel 2.6.10 only for PowerPC (PPC32) architecture.